
a{
    text-decoration: none;
    
}
#course_detail{
    position: relative;
    height: 500px;
    border: 1px solid black;
    margin-top: 10px;
    margin-bottom: 10px;
}
.img_course{
    position: absolute;
    width: 640px;
    height: 350px;
    top: 60px;
    left: 70px;
}
#course_title{
    position: absolute;
    font-size: 25px;
    display: inline-block;
    top: 60px;
    left: 740px;

}
#course_title2{

    position: absolute;
    font-size: 13px;
    display: inline-block;
    top: 110px;
    left: 765px;
    
}
#life_time{
    position: absolute;
    font-size: 20px;
    display: inline-block;
    top: 155px;
    left: 740px;
    
}
#enroll_num{
    position: absolute;
    font-size: 20px;
    display: inline-block;
    top: 155px;
    left: 905px;
}
#free{
    position: absolute;
    font-size: 13px;
    display: inline-block;
    top: 210px;
    left: 740px;
    font-size: 30px;
    color: #fd573f;
}
#sign_up_now{
    position: absolute;
    font-size: 22px;
    display: inline-block;
    background-color: #fd573f;
    top: 365px;
    left: 740px;
    width: 150px;
    height: 45px;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    
}
#move_text{
    display: inline-block;
    font-size: 35px;
    margin-top: 355px;
    margin-left: 730px;
}
ul {
    position: absolute;
    width: 500px;
    height: 80px;
    top: 403px;
    left: 66px;
}
li{
    display: inline-block;
    width: 150px;
    height: 50px;
    margin-top: 28px;
    overflow: hidden;
}


#first_page{
    position: absolute;
    top: 30px;
    left: 90px;
    color: #666;
}
#course_class{
    position: absolute;
    top: 30px;
    left: 160px;
    color: #666;
}
#course_name{
    position: absolute;
    top: 13px;
    left: 247px;
    color: #666;
}
#lt1{
    position: absolute;
    top: 35px;
    left: 140px;
    color: #666;
}
#lt2{
    position: absolute;
    top: 35px;
    left: 230px;
    color: #666;
}
.c1{
    font-size: 20px;
    width: 150px;
    text-align: center;
    height: 50px;
    display: inline-block;
    margin-top: 0px;
    margin-left: 0px;
    color: #666;
    
}
.c1:active{
    color: aqua;
}








#head_line{
            height:80px;
            background-color:#266ec0;
        }
#head_line a{
            color:white;
            text-decoration: none;
            display: inline;
            /* text-align: center;  */
            font-size: 20px;
            margin: 20px;
            vertical-align:middle;
        }
#head_line a:hover{
            color:#082b7e;
            cursor:pointer;
        }
#head_line img{
            height: 80px;
            width:105px;
            vertical-align:middle;
        }
 /*------- 展示菜单和轮播图------- */

#display{display: inline;}
#display .menu li{
            /* display: inline;  */
            width: 300px;
            margin-top: 0px;
            vertical-align: middle;
            list-style: none;
        }
#display .banner img{
            height: 400px;
            width: 1000px;
            margin-left: 200px;
            margin-top: 10px;
            display: inline;
        }